Differential TDR Measurements
Measuring Differential and Common Mode Impedance
8-9
Figure 8-4
Establishing the Reference Plane
Since we want to measure the impedance of a differential line, we must establish
the reference plane so the scope can measure the height of the TDR step height.
1
Press the
TDR/TDT Setup key.
2
Press the
Establish ref plane
softkey.
3
Connect an SMA short to the end of the cable on channel 1.
4
Press the
Continue
softkey.
5
Remove the SMA short from the end of the cable and connect an SMA
50 ohm load to the end of the cable.
6
Press the
Continue
softkey.
7
Remove the SMA 50 load from the end of the cable.
8
Connect an SMA short to the end of the cable on channel 2.
9
Press the
Continue
softkey.
10
Remove the SMA short from the end of the cable and connect an SMA
50 ohm load to the end of the cable.
11
Press the
Continue
softkey.
12
Remove the SMA 50 load from the end of the cable.
To Next Page
Loading...
